Accession Number : AD0707338

Title :   FRACTURE TOUGHNESS OF STRUCTURAL METALS.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Lange,E. A.

Report Date : 04 MAY 1970

Pagination or Media Count : 29

Abstract : On the basis of the information presented in the report, the following conclusions are stated concerning the status of the engineering approach to fracture-safe design using fracture-toughness values as performance criteria. (1) The coupling between engineering fracture tests (C sub v and DT) for measurement of fracture resistance and linear-elastic fracture mechanics theory has been achieved. (2) Interpretive diagram systems (FAD and RAD) have been developed which couple the fracture toughness values from engineering fracture tests to the analytical capability of fracture mechanics. (3) The DT test has the capability for measuring a broad range of fracture toughness extending from the low energy region pertaining to elastic fractures to the high-energy region pertaining to fully plastic fracture. (4) Difficulties in the interpretation of C sub v energy values within the transition region (plane strain to plane stress) for high-strength steels and nonferrous structural alloys may limit the use of C sub v energy as a performance criteria for certain materials. (Author)

Descriptors :   (*METALS, *FRACTURE(MECHANICS)), TOUGHNESS, NONDESTRUCTIVE TESTING, STEEL, TITANIUM ALLOYS, ALUMINUM ALLOYS, DESIGN

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE